Pleistocene drivers of Northwest African ...
Document type :
Compte-rendu et recension critique d'ouvrage
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Title :
Pleistocene drivers of Northwest African hydroclimate and vegetation
Author(s) :
O’mara, Nicholas [Auteur]
Lamont-Doherty Earth Observatory [LDEO]
Skonieczny, Charlotte [Auteur]
Géosciences Paris Saclay [GEOPS]
Mcgee, David [Auteur]
Massachusetts Institute of Technology [MIT]
Winckler, Gisela [Auteur]
Lamont-Doherty Earth Observatory [LDEO]
Bory, Aloys [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Bradtmiller, Louisa [Auteur]
Malaizé, Bruno [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Polissar, Pratigya [Auteur]
Lamont-Doherty Earth Observatory [LDEO]
Skonieczny, Charlotte [Auteur]
Géosciences Paris Saclay [GEOPS]
Mcgee, David [Auteur]
Massachusetts Institute of Technology [MIT]
Winckler, Gisela [Auteur]
Lamont-Doherty Earth Observatory [LDEO]
Bory, Aloys [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Bradtmiller, Louisa [Auteur]
Malaizé, Bruno [Auteur]
Environnements et Paléoenvironnements OCéaniques [EPOC]
Polissar, Pratigya [Auteur]
Journal title :
Nature Communications
Pages :
3552
Publisher :
Nature Publishing Group
Publication date :
2022-06-21
ISSN :
2041-1723
English abstract : [en]
Abstract Savanna ecosystems were the landscapes for human evolution and are vital to modern Sub-Saharan African food security, yet the fundamental drivers of climate and ecology in these ecosystems remain unclear. Here we ...
Show more >Abstract Savanna ecosystems were the landscapes for human evolution and are vital to modern Sub-Saharan African food security, yet the fundamental drivers of climate and ecology in these ecosystems remain unclear. Here we generate plant-wax isotope and dust flux records to explore the mechanistic drivers of the Northwest African monsoon, and to assess ecosystem responses to changes in monsoon rainfall and atmospheric pCO 2 . We show that monsoon rainfall is controlled by low-latitude insolation gradients and that while increases in precipitation are associated with expansion of grasslands into desert landscapes, changes in pCO 2 predominantly drive the C 3 /C 4 composition of savanna ecosystems.Show less >
Show more >Abstract Savanna ecosystems were the landscapes for human evolution and are vital to modern Sub-Saharan African food security, yet the fundamental drivers of climate and ecology in these ecosystems remain unclear. Here we generate plant-wax isotope and dust flux records to explore the mechanistic drivers of the Northwest African monsoon, and to assess ecosystem responses to changes in monsoon rainfall and atmospheric pCO 2 . We show that monsoon rainfall is controlled by low-latitude insolation gradients and that while increases in precipitation are associated with expansion of grasslands into desert landscapes, changes in pCO 2 predominantly drive the C 3 /C 4 composition of savanna ecosystems.Show less >
Language :
Anglais
Popular science :
Non
Source :
Submission date :
2024-01-18T05:42:48Z
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